From WiKirby, your independent source of Kirby knowledge.
Slushy is an enemy found in Kirby 64: The Crystal Shards, first sighted in Stage 1 of Shiver Star. It does not yield a Copy Ability when swallowed. Slushy appears on the 19th Enemy Info Card.
Slushy somewhat resembles a jellyfish, with two dots for eyes. It likes to hang out in frigid water, preferably with the surface frozen over. That way, Kirby will have a harder time escaping when it vies to get in his way.
Slushy can be found in the following levels and stages: